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Privacy Policy

Slouly - Music Speed Changer (“Slouly”, “the app”)

Effective date: 23 September 2026

This policy explains what happens to your data when you use the Slouly app for iPhone and iPad, the website tryslouly.app and our support. It is written to be complete: if something is not described here, Slouly does not do it.

1. Who is responsible

The controller under the EU General Data Protection Regulation (GDPR) is:

Aibek Mazhitov
Friedenauer Höhe 22
12159 Berlin
Germany
Email: heyaibek@gmail.com

Slouly is made by one independent developer. There is no company behind it, no advertising partner and no data broker. We have not appointed a data protection officer, because the law does not require one for us.

2. Short version

  1. No account. You never sign up, log in or give us your name to use the app.
  2. Your music stays on your device. Songs, videos you take audio from, your effect settings and exported files are stored only on your iPhone or iPad. We never upload them and we cannot see them.
  3. No ads, no tracking, no selling. The app contains no advertising, no analytics and no tracking across other apps or websites. We do not sell or rent your data to anyone.
  4. Crash reports only. If the app crashes, a technical crash report is sent so we can fix the bug. You can turn this off in Settings.
  5. Payments go through Apple. We never see your name, email address or payment details when you buy Slouly Premium.

3. Data that stays on your device

Everything you do in Slouly is processed on your device only:

  • songs and audio files you import from the Files app,
  • videos you pick from your photo library to take their audio,
  • your effect settings (tempo, pitch, reverb, bass boost and panning), which the app remembers for next time,
  • the audio files you export.

Exported files are saved in the Slouly folder of the Files app on your device. They are not sent to us or to anyone else. You can delete them at any time in the Files app, or delete everything at once by deleting the app. Please note that we have no copy: if you delete the app or lose your device, your files cannot be restored by us.

If your device is set to back up to iCloud or a computer, Apple’s backup may include the app’s storage. This backup is controlled by you and Apple, under Apple’s privacy policy, not by us.

4. Permissions the app asks for

Photo library. When you choose Extract From Video, Slouly asks for access to your photo library so you can pick a video and take its audio. You can allow access to all photos, to selected photos only, or deny it, and change this at any time in the iOS Settings app. Videos are read on your device only.

Files. When you import a song through the Files app, the app only reads the file you pick.

Slouly does not access your microphone, camera, contacts, location, calendar, health data or music library, and does not ask for permission to track you (App Tracking Transparency). The app does not read the advertising identifier (IDFA).

5. Crash reports (Firebase Crashlytics)

What. When the app crashes, it sends a crash report to Firebase Crashlytics, a service of Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland (“Google”). A report contains:

  • the technical crash details (which part of the app code failed and why),
  • device model, iOS version, app version and build number,
  • technical state at the time of the crash (for example free memory and storage, device orientation, whether the app was in the foreground),
  • a random installation ID created by Crashlytics, so repeated crashes on the same device can be counted as one affected user,
  • your IP address, which is technically needed to send the report over the internet.

A crash report never contains your songs, videos, exported files or any other content. It does not contain your name, email address or Apple ID. We cannot use it to find out who you are.

Why. To find and fix bugs that make the app crash.

Legal basis. Our legitimate interest in providing an app that works reliably (Article 6(1)(f) GDPR). Storing and reading the installation ID on your device is strictly necessary for the crash reporting you can control in the app (Section 25(2) no. 2 of the German Telecommunications Digital Services Data Protection Act, TDDDG).

Your choice. You can turn crash reports off at any time in the app under Menu (•••) > Settings > Privacy > Share Crash Reports. When you turn it off, reports that were not sent yet are deleted and no further reports are sent. You can also object at any time (see Section 11).

How long. Google keeps crash reports for 90 days, then deletes them.

Processor. Google processes this data on our behalf under the Google Cloud and Firebase data processing terms. More information: https://firebase.google.com/support/privacy

6. Purchases (Slouly Premium)

Slouly Premium is a one-time purchase sold and processed by Apple through the App Store. Apple handles payment, billing, refunds and your Apple ID. We never receive your name, email address, Apple ID, address or payment details.

To unlock Premium, the app asks Apple’s StoreKit system on your device which purchases your Apple ID owns. This check happens between your device and Apple. From Apple, we only receive anonymous, aggregated sales reports (for example how many purchases were made in a country), which do not identify you.

Apple’s privacy policy applies to purchases: https://www.apple.com/legal/privacy/

7. Sharing and other apps

Exported files. You decide where your files go. When you open an exported file in the Files app or share it from there, it goes where you send it. We receive nothing.

Recommend Slouly. This opens the iOS share sheet with a link to Slouly on the App Store. You choose whether and with whom to share it.

App Store links. Leave Review and the link to our other app Vibely open the App Store. Apple’s privacy policy applies there.

8. Website and in-app links

Hosting. The website tryslouly.app, including the Privacy, Terms and Support pages that the app opens, is hosted by GitHub Pages, a service of GitHub, Inc., 88 Colin P. Kelly Jr. Street, San Francisco, CA 94107, USA. When you open a page, your browser sends technical data, including your IP address, the page requested, the date and time and your browser type, to GitHub. GitHub uses this data to deliver the website and to keep it secure, and may store it in log files for security purposes. Legal basis: our legitimate interest in a secure, working website (Article 6(1)(f) GDPR). GitHub’s privacy statement: https://docs.github.com/site-policy/privacy-policies/github-general-privacy-statement

No cookies, no analytics. The website sets no cookies, uses no analytics or tracking tools, and loads no fonts or scripts from other servers.

Support link. When you open Get Support from the app, the link includes your app version and iOS version (for example “app_version=v1.0.6 (1)&os_version=iOS 26.1”), so we can see which version you are asking about if you contact us. This contains no personal information.

9. Contacting support

If you email us, we receive your email address, your name if you include it, your message and anything you attach. We use this only to answer you and to fix the problem you report.

Legal basis: answering your request (Article 6(1)(b) GDPR, where it is about a contract, otherwise Article 6(1)(f) GDPR, our legitimate interest in answering). We use Gmail, a service of Google, to receive and send email.

We delete support conversations when they are no longer needed, and at the latest two years after the conversation ends, unless we must keep them longer by law.

10. International transfers

Some of the providers above are based in the USA or send data there (Google LLC, GitHub, Inc.). Where a provider is certified under the EU-U.S. Data Privacy Framework, the transfer is based on the European Commission’s adequacy decision (Article 45 GDPR). Otherwise, it is based on the European Commission’s Standard Contractual Clauses (Article 46(2)(c) GDPR).

11. Your rights

Under the GDPR you have the right to:

  • access the data we hold about you (Article 15),
  • correct incorrect data (Article 16),
  • delete your data (Article 17),
  • restrict processing (Article 18),
  • data portability (Article 20),
  • withdraw consent at any time, with effect for the future, where processing is based on consent (Article 7(3)).

Right to object (Article 21 GDPR). Where we process your data based on our legitimate interest (Article 6(1)(f) GDPR), you can object at any time for reasons arising from your particular situation. For crash reports, simply turn off Share Crash Reports in the app’s Settings.

To use your rights, email heyaibek@gmail.com. Please note: because crash reports and App Store data do not identify you, we usually cannot link them to you (Article 11 GDPR). Data that exists only on your device is fully in your control and can be deleted by you at any time.

You also have the right to lodge a complaint with a data protection supervisory authority, in particular in the EU member state where you live or work, or where you think a violation took place (Article 77 GDPR).

12. What Slouly does not do

  • no advertising and no ad networks,
  • no analytics or usage tracking in the app or on the website,
  • no tracking across apps or websites and no advertising identifier,
  • no selling, renting or trading of personal data,
  • no profiling and no automated decisions with legal or similarly significant effect,
  • no user accounts, no cloud storage of your content, no access to your contacts, location, microphone or camera.

13. Children

The app does not require any personal data, so it can be used by anyone the App Store age rating allows. We do not knowingly collect personal data from children. If you believe a child has sent us personal data, please contact us and we will delete it.

14. Security

Data sent to Crashlytics and our website is encrypted in transit (HTTPS). Access to the support email is limited to the developer. Content in the app stays on your device and is protected by your device’s own security, such as your passcode and iOS data protection.

15. Changes to this policy

We update this policy when Slouly changes how it handles data, for example if we add a new feature or service provider. The effective date at the top always shows the current version. If a change affects data we already hold, we will tell you in the app or on the website before it takes effect.

16. Contact

Aibek Mazhitov
Friedenauer Höhe 22
12159 Berlin
Germany
heyaibek@gmail.com